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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 15, 1998. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 8159 | N33 | E41 | 03 | 0010 | BETA | Feb 19, 1998 | Feb 26, 1998 | Mar 13, 1998 |
| № 8158 | S20 | E36 | 04 | 0020 | BETA | Feb 19, 1998 | Feb 26, 1998 | Mar 11, 1998 |
| № 8157 | N28 | E28 | 01 | 0000 | ALPHA | Feb 18, 1998 | Feb 25, 1998 | Mar 11, 1998 |
| № 8156 | S24 | E16 | 29 | 0360 | BETA | Feb 17, 1998 | Feb 24, 1998 | Mar 10, 1998 |
| № 8151 | S24 | W67 | 01 | 0000 | ALPHA | Feb 11, 1998 | Feb 18, 1998 | Mar 4, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to February 1998. The gray background is the average SSN index.
